Mechanism for transmitting motion



' C. S. OLDROYD MEGHANISMFOR TRANSMITTING MOTION Filed Nov. 14, 1919 2Sheets-Sheet 1 K F g.

ltl

Patented Dec. 30, 1924.

CYRUS S. OLDIR-OYD, OF CINCINNATI, OHIO.

MECHANISM FOR TRANSMITTING MOTION.

7 Application filed November 14, 1919. Serial No. 338,065.

shaft to the second shaft may be at different velocities and in either direction or entirely suspended at the will of the operator.

In the accompanying drawings,

Fig. l is a sideelevation of a part of the wall of a machine to which niyiinproved mechanism is appl'ed;

Fig. 2 is a plan of the mechanism shown by Fig. 1, a part being broken away;

Fig. 3 is a perspective View of aplate concerned with the control. of the pawl;

Fig. 4: is a section on the line, 44, of ig. 2, looking in the direction of the arrow; Fig. 5 is a section on the line, 5-5, of Figs. 2, 6 and 7 looking in the'direction of the arrows;

Fig. 6 is a horizontal section on the line, 6-6, of Fig. 5;

Fig. is an upright section on the line, 77, of Figs. 1 and 5, looking toward the right.

Fig. 8 is a perspective of the pawl and pawl stein.

Referring to said drawings, A is an up right wall of a machine having horizontal and parallel shafts, B and C, extending through and having bearings in said wall.

The shaft, B, is rotated in either direction by means not shown, and transmission is from said shaft to the shaft, C.

On the end of the shaft, B, which projects through the front of the wall, A, as shown in Figs. 1 and 2, is a crank, I3 rigid with sa d shaft. Fixed on the shaft, C, is a ratchet wheel, G which is to receive motion from the pawl, D, said pawl engaging the teeth, C of said wheel. Said teeth are symmetrical and adapted to be en aged by the pawl for turning the wheel in either di rection, one side of the pawl being slanting and the other side being upright or radial to said wheel, so that when the pawl is moved to bear said upright face against a tooth, the latter will be moved with the pawl, and so that when the slanting face of the pawl 1s pressed against the tooth, said slanting face will slide upward and forward over said tooth, the pawl making its movement without moving the tooth. The pawl is supportedby the pawl stein, D which is supported in the rocking structure which will now be described.

The rocking structure, 13, surrounds the ratchet wheel, and has bearings, B at each side of the ratchet wheel to receive the shaft. By this means, the rocking structure is journaled for rocking on the shaft. Said structure consists of two d sk-form parts meeting in a plane which is parallel to the front face of the wall, A. On each of said parts are cars, Bfithrough which extend horizontal binding bolts, I3, whereby said parts are secured iun'uo'mbly to each other. On each of said parts is an ear, B The upper end of the pitn'ian, B extends between said ears and is there coupled by the pintle, B extending through said ears and said pitnian. The other end of said pitinan is coupled to the crank, B Every rotation of the crank imparts a: reciprocation to the pitnian, and such reciprocation turns the rocking structure first in one direction and then in the other through a range correspond ng to the rz dius of the crank.

In the upper part of the rocking structure is formed a chamber, B in which rests the lower end of the pawl stein, D A cap, E (shown in perspective in Fig.3), is seated across the upper end of said chamber and secured to the structure, 13, by screws, E In said cap, E, is a bearing, E for the stein, D In the lower part of said chamber, the stem has two annular ribs, D the lower of which is even with the adjacent end of the stem and with the latter rests on the teeth of the ratchet wheel. A fork, F, rests between said ribs within said chamber and the stern, F of said fork extends rearward (toward the wall, A) through the upright slot, F in the wall of the rocking structure, said slot allowing upright movement of the stern. Above the upper of said ribs, the stem, D is I surrounded by an expanding coiled spring, D which bears dmvnward against said rib and upwar. L against the cap, E. whereby the stem is normally pressed downward yieldingly. The cap, E, has a raised spaced on the quarters of a circle. On the stem, D is a cross-arm, Dfl'whicli is adaptpart, E yaround the bearing, E In the upper face of said raised part are grooves, E which are radial to said bearingand ed. to rest in the 'rooves E when the stem isturned so as to bring the cross-arm above two of the grooves.

7 One pair of said grooves are deep enough to allow the pawl to extend between the teeth of the ratchet wheel wvhen the cross-arm is in those grooves; and the other pair of grooves are not deep enough to permit the pawlto' extend between the ratchet teeth when the cross-arm is in those grooves. These grooves are so positioned'on the'cap and the crossarm is so positioned on the stem as to per mit the cross-arm to enter the deep grooves when the pawl is parallel to the ratchet teeth and so as to bring the cross-arm into the shallow grooves when the pawl is crosswise of the ratchet teeth. The engagement of the arm in the grooves serves the double function of limiting the downward-movement of the stem and to prevent the turning of the pawl after it has been brought into the desired position relative to the ratchet teeth-either parallel to or transverse to the ratchet teeth; W hen the cross-arm has entered a pair of grooves, the downwardpressure of the spring on the stem tends to keep the cross-arm in those grooves. On the upper end of the stem, D 1s a head,D"', to be grasped by the fingers of the operator for lifting and turning said stein. It is to be observed that the stem is free to turn in either direction after it has been lifted high enough to disengage the pawl, D, from the teeth, C and to disengage the cross-arm from the grooves, E*, the stem turning freely in the fork, F. When the stem has been thuslifted, it may be turned so as to allow the slanting face of the pawl to face toward the right or toward the left or so as to bring the pawl crosswise of the'ratchet teeth. The pawl is long enough in the horizontal direction toextend acrossthe space between two ratchet teeth and rest upon said teeth when the pawl is crosswise of the teeth. in this latter position, the pawl may be reciprocated horizontally by the rocking of the rock ingstructure without engaging the ratchet teeth for moving the latter, the pawl merely sliding onthe upper ends of said teeth.

ratchet wheel,

path of the fork stem, F

a reduction of the transmisslonto the shaft,

rockingstructure, in order that the ratchet wheel may be turned through a range which is less than the range through which the if I rocking structure turns. V 7

On the shaft, G, between the rocking structure and the wall. A, is a cam, G, which is loose on said shaft b'utri'gid with a spur gear wheel, ,lWl1lCll also loosely surrounds said shaft between the cam and the wall, A..

Said spur gear wheel meshes with a spur gearwheel, G which ismounted for rotation on a stationary shaft, G which projects forward from the wall, A. On said wheel is a crank, G, which has a handle, Behind the handle is a lug,'G?, which is adapted to rest in any one'of the sockets, G

on the wall, A, said sockets being in asemicircle which is concentric to the shaft, G

The crank, G, is flexible' and the lug, G

normally rests in one of the'sockets,G7, The operator may force the outer part of the crank away from the wall, A, sufliciently to permit turning the crank on' the shaft, G", until the lug, Gr, enters another socket. By

this means the spur gear wheel, G is given a partial rotation, and thereby the spur gear w eel, G and the cam, G, are given apar tial rotation. In this way the cam may be so set as to be entirely out of thepath of the stem, F of the fork, whereby said stem, F and the pawl stem, 1)", are free to be pressed downward by thesprin D the pawl during the full range'of its movement in one direction carrying the ratchet wheel through the same range in the same direce tion; Or the-cam may be so turned as to extend into any desiredportion ofthe path of the for; stem, F 7 i I i 7 Bv way of summary, it is now stated that the shaft, B, rotates constantly in either direction, and that motion causes the reciprocation, of the pitman, B, through a fixed range, and that causes the rocking of the rocking structure through a Fred range. Whether the rocking of the rockingstructure causes the turning of the ratchet wheel depends upon whether thepawl is turnedto bring its working face parallel to the teeth of the ratchet wheel or whether the pawl is turned crosswise of and rests upon theteeth.

If the latter, no motion'is transmitted to the If the former, motion is.

transmitted tothe ratchet wheel. in thedirection of the radial face the pawl. If the motion of the ratchet wheel is to be reversed, the operator pulls the pawl stem upward and turns it half way around and then releases it. If the transinissionjis to'he at its maximumthe pawl engaging the ratchet .wheel during the entire range of the movement of the pawlthecrank, i is set'so as to place the cam, G. entirely outside of the C. the 111 G of the craiik. G is shifted If there is to be into engagement with another of the sockets, G

I claim as my invention,

1. In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on the axial line of said wheel, a pawl and pawl stem mounted approximately radial to the axis of the ratchet wheel to permit endwise movement toward and from the ratchet wheel and to be turned on the axis of said stem, means yieldingly pressing said pawl toward said wheel, and adjustable means adapted to lift said stem endwise during a part of each movement of the rocking structure, substantially as described.

2. In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on the axial line of said wheel, a pawl and pawl stem mounted approximately radial to the axis of the ratchet wheel to permit endwise movement toward and from the ratchet wheel and to be turned on the axis of said stem, a lateral arm in engagement with said stem, means yieldingly pressing said pawl toward said wheel, and adjustable means adapted to lift said arm dur ing a part of each movement of the rocking structure, whereby the stem' and pawl are lifted out oi? the working position during such parts of the movements of the rocking structure, substantially as described.

In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on the axis of said wheel, a pawl and pawl stem mounted approximately radial to the axis of the ratchet wheel to permit endwise movement toward and from the ratchet wheel and to be turned on the axis of said stem and said stem bearing two annular ribs, a lateral arm extending between said ribs to make engagement compelling said arm and said stem to move up and down in unison but to permit rotation of the stem relative to said arm, means yieldingly pressing said pawl toward said wheel. a d a justable means adapted to lift said arm during a part of each movement of the rocking structure, whereby the stem and pawl are lifted out of the working position ,duringsuch parts of the movements of the rocking structure, substantially as described.

at. In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mount ed to rock onthe axial line of said wheel,

a pawl and pawl stem mounted approximately radial to the axis of the ratchet wheel and to permit endwise movement toward and from the ratchet wheel and to be turned on the axis of said stein. whereby the pawl may be set for engagement with the teeth of the ratchet wheel during either the forward or return movement of the rocking structure, yielding means tending to move the pawl and stem toward the wheel, means for limiting the movement of the pawl toward the wheel when the pawl is in either oi its two working positions and holding the pawl against turning while the pawl is in either of its two working posi ions, means for continuously holding the pawl tar enough from the wheel axis to bring the pawl out of the path of the teeth of the wheel, and adjustable means adapted to hit the stem endwise during a part of each movement of the rocking structure, substantially as described.

5. In a mechanism of the nature de scribed, the combination of a ratchet wheel mounted for rotation, a rocking structure mount-ed to rock on the axial line of said wheel, and said rocking structure comprising a body divided into two parts along a plane to which said axial line is perpendicular, and said sections having ears, bolts joining said cars, a pawl supported on said rocking structure for rotation and endwise movement, yielding means tending to more said pawl toward said wheel, and means for limiting the movement of the pawl toward the wheel, substantially as described.

6. In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on the axial line of said wheel, and said rocking structure comprising a body divided into two parts along a plane to'which said axial line is perpendicular, and said sections having ears, bolts, joining said cars, a cap seated on said body and having a bearing, a pawl supported on said rocking structure and having its stem in said bearing for rotation and endwise movement, yielding means tending to move said pawl toward said wheel, and means for limiting the movei'nent of said pawl toward the wheel, substantially as described.

7. In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on the axial line of said wheel, and said rocking structure comprisinga body divided into two parts along a plane to which said axial line is perpendicular, and said sect-ions having ears, bolts joining said ears, and said parts having other ea s, a. pitman coupled to said cars, a pawl supported on said rocking structure for rotation and endwise movement. yielding meansv tending to move said pawl toward said wheel, and means for limiting the movement of the pawl to aid the wheel, substantially as described.

8. In a mechanism of the nature described. thecombination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on the axial line of said wheel, a pawl supported in said rocking.

structure for rotation and endwise move ment, yielding means tending to move said pawl toward said wheel, a fork having a stem extending laterally from the pawl and said fork en ging the pawl to permit turn a 7 ing of the pawl independently of said fork but to compelup-and-down movement with said fork and means adapted to lift said to-rk stem during a part ot the movement V of therocking structure, substantially as described.

9.111 ameehanism of the nature described, the combination ota ratchet wheel mounted for rotation. alocking structure mounted to rock on the axial line of said wheel, a pawl supported in said rocking structure for rotation and endwise movement and said pawl'having two annular ribs, vieldmg means tending to move said pawl toward said wheel, a stem extending laterally from the pawl and having a fork extending between said annular ribs to permit turning of the pawl independently of said fork but to comuel up-aml-down movement of said fork and means adapted to lift said fork stem during a parto'tthe movement of the rocking structure, substantially as described." 7

I 10. In a mechanism of the nature described, the combination of a ratchet wheel mounted for rotation, a rocking structure mounted to rock on theaxial line of said wheel, a pawl and pawl stein mounted approximately radial to theaxis of the ratchet wheel to permit endwise movement toward and. from the ratchet wheel and to be turned a on the axis ot'said'stem, means yieldingly vpressing said pawl toward said wheel, and an achustable cam adapted to lift said stein endwise during a part of the movement of the rockingstructure, substantially as described. V

11. In a mechanism of the' nature vde-c scribed,the combination of a ratchet wheel mounted for rotat on, a LOCKIHQ structure mounted to rock on' the axial line of said wheel; a pawl and pawl stem'mounted ap-- proximately 'adial to the axis of theratchet wheel to permit .endwise movement toward CYRUS s. 'OLDROYD. 

